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( Modem 3 4 2 Sheets-Sheet 2. R. COLLINS.

Loom. N0. 239,936-[ 7 Patented April 12, I88.

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UNITED STATES PATENT OFF CE.

RICHARD COLLINS, OF SPRINGFIELD, MASSACHUSETTS, ASSIGNOR TO HIM- SELF AND WILLIAM G. MGOLALLAN, OF SAME PLACE.

LOOM.

SPECIFICATION forming part of Letters Patent No. 239,936, dated April 12, 1881.

Application filed April 26, 1880., (No model.) i

1o tions and the rocker to the picker-stick.

In the drawings, Figure I is a plan view, with all of the upper parts of a loom removed to show the harness and shuttle motions. Fig.

II is a partial front elevation of a loom, showl ing the harness and shuttle motions, together with the construction of the rocker to the picker-staff and its seat. Fig. III is aside elevation of so much of a loom as shows the connection between the driving-shaft and cam bearing shaft for directly governing the harness and shuttle motions; and Fig. IV is a modification of the combined harness and shuttle operating cams shown in Fig. I, to adapt them to the operation of three sets of 2 5 harness.

Upon the shaft B, which is geared directly to the driving-shaft O, is fixed the cylinder D, provided with the cam-groove 01, within which groove works the end of the crank-arm e of rock-shaft E. The shaft E works in bearings f framed to the loom, and has the end of its crank-arm. 6 provided with the roller g, while its other end carries the pulley h, to which are attached the ends of straps 7a m, for raising and lowering the harness. The roller 9 does away with friction in the contact of the end of the crankarm ewith the walls of groove d of the cylinder D.

It will be seen that the rotation of the cylinder D, by partially rotating pulley h, raises and lowers the harness a distance proportionate to the periphery of hub h, to which the ends of straps k m are attached, so that in practice it is only necessary to proportion the size of pulley h to the arc of rotation given crank-arm e to insure the proper angle being given to the shed of the warp. The groove d is formed in cylinder D, so as to oscillate the hub h to raise and lower each of two sets of 50 harness during one revolution of shaft B, and

is peculiar in being'so formed as to have two dwells at opposite sides of the cylinder, which serve the purpose of holding the harness stationary at the moment the shuttle is thrown.

In Fig. II the crank-arm e is shown as just entering the rest or dwell, the intermediate Walls of the groove giving a uniform. vibration to the arm 0.

Fixed upon shaftB are cylinders H H, provided with the camgrooves 0 0, in which work the ends of vibrating levers I I. The levers I I are hinged upon studs or projections '22 c from the frame J of the loom, so as to receive horizontal vibrations from the revolution of cylinders EH. The ends of levers I I, playing in grooves 0 0, are provided with rollers to diminish friction, while their other and longer ends are attached by rigid connections to w to the picker-sticks K K. The camgrooves 0 0 in cylinders H- H are reverse 7o counterparts of each other, and each is formed so as to cause its picker-stick to make one throw during the revolution of shaft B,- while the cams o 0 are so relatively arranged upon the shaft B as to cause the picker-sticks to alterna-te to make two throws of the shuttle during one revolution of shaft 13, and thus cause 4 the motion of the shuttle to bear the proper relation to the movementof the harness. The walls of the grooves 0 0, by coming at all times in contact with the ends of levers I I, so govern the motions of the picker-sticks as to cause them to deliver their blows and return to their positions for receiving the blow of the shuttle without superfluous vibration, to the avoidance of the aberration that frequently causes the rocker to leave its seat and the shuttle to bethrown over the boxes.

In Figs. I and II of the drawings an operating cylinder for two sets of harnesses is 9 shown, in combination with cams for a shuttle-motion to correspond; but without a departure from the principle of this invention a cylinder may be substituted, as shown in Fig. IV, to contain more than one cam-groove to operate three or more sets of harnesses. The changed arrangement of rocker and strap-pulley to correspond with the duplication of camgrooves in the harness-cylinder is such as will suggest itself-to any mechanic, the shaft E in I p; I v 1 Fig. IV being shown as having a duplicate placed beside-it. Itmay have another sleeved upon it, with a longer crank-arm. .The harness and shuttle motions thus described are noiseless, compact, and positive-acting at all times.

In Fig.1l is shown the construction of a rocker and seat for picker-stick, which insures a uniform and easy rock to the stick, as well as prevents the rocker from being entirely thrown off its seat, operating as follows: Upon the lower side of plate 3 is the spur 1, having a bearing-surface as near as possible coincident to a curve described from the center of oscillation of the rocker; and from the rear of this rocker, projecting downward and inward through a guiding-slot, 10,-left open in the outer end of plate y, is a horn, j, whose end bears on the surface of the spur i as the rear of the rockerrises and falls, or comes sufficiently near the bearing-surface of spur i to prevent the rocker from being abnormally moved, and thereby compelling the picker-stick K to be in its proper place in the shuttle-box. The hern j at the base of spur z' comes against the bottom of plate y, to always retain the rocker upon its seat.

As the portion of the mechanism of a let-oft motion for the yarn-roll of a loom shown in Fig; I forms part of an application for a patent-now before the Oifice for an improvement in looms, filed by me June 9, 1880, and embracing said device in its claim, I hereby disclaim any part of such device as forming part of this patent.

B and provided with crank-arm e, and pulley h, with cam cylinders H H, arranged upon shaft 13 to be revolved therewith, and provided with cam-grooves 0 0, vibrating levers I I, pivoted at points intermediate to their ends, rigid connections 10 w, and picker-sticks K K, whereby, through the rotation of shaft B common to cams D and HH, the harnesses are alternately opened and closed and the shuttle is positively propel-led through the opened warp at the moment of its dwell, substantially as shown and described.

2. The rocker provided with the horn j and guiding-projection, in combination with the seat 3 adapted to be attached to the frame of a loom, and provided with slot 10 to receive the guiding-projection of the rocker, and spur t, as and for the purpose shown and described.

' RICHARD coLLINs.

Witnesses H. F. HYDE, T. M. BROWN. 

